Target Audience:
Ferrari owners, mechanics, and automotive technicians specializing in classic Italian exotics.
Differentiation:
This manual is specifically a wiring diagram, differentiating it from more comprehensive workshop manuals which may have less detailed electrical schematics. It focuses solely on the electrical architecture.
Essential Resource:
An indispensable resource for any diagnostic or repair work on the 328's complex electrical system.
Accuracy:
Provides accurate and detailed schematic representations crucial for correct identification of wiring and circuits.
Coverage Scope:
Covers all electrical systems as listed, offering a complete electrical overview for the specified model year.
Systems Covered:
Fuses and Relays, Cable Color Codes, Alternator, Starter Motor, Fuel Injection System, Ignition System, Windscreen Wiper and Washer, Horns, Current Socket, Controls and Displays, External Lights and Controls, Radio, Doorglass Winders, Door Locking Actuators, Interior Lights, Cigarette Lighter, Heating System, Air Conditioning System, ABS System
Estimated Page Count:
Estimated 50-100 pages (specific page count not provided, typical for wiring diagrams)
Manual Type:
Wiring Diagram Manual (Dedicated)
Language:
English (presumed, standard for Ferrari documentation)
Format:
Printed (typical for this era, digital versions may also exist)
Electrical Systems:
Comprehensive electrical system schematic focusing on all major electrical components and their interconnections.
Fuel System:
Detailed wiring for the fuel injection system, including sensors, injectors, and control unit.
Ignition System:
Wiring diagrams specific to the ignition system, covering coils, distributors, and control modules.
Lighting:
Complete coverage of external and internal lighting circuits, including headlights, taillights, brake lights, turn signals, and interior illumination.
Comfort Systems:
Wiring for HVAC (Heating, Ventilation, and Air Conditioning), power windows, door locks, and audio systems.
Safety Systems:
Wiring for the Anti-lock Braking System (ABS), including its sensors and control module.
Diagnostic Aids:
Wiring diagrams serve as a primary tool for diagnosing electrical faults, tracing circuits, and identifying potential issues.
Component Identification:
Facilitates the identification of electrical components through their schematic representation and wire routing.
Cable Tracing:
Detailed routing and color coding of cables allow for precise tracing of electrical pathways.
Level Of Detail:
Highly detailed, illustrating every wire, connector, and component in the electrical system.
Component Specs:
Includes fuse ratings, relay assignments, and general specifications for electrical components.
Circuit Analysis:
Enables in-depth analysis of individual electrical circuits for troubleshooting and repair.
Digital Format:
PDF (common for digital reproductions), High-resolution scans of original diagrams.
Print Quality:
High-resolution, clear line drawings and text suitable for printing.
Binding Type:
Spiral-bound or Saddle-stitched (for printed versions) for ease of use on a workbench.
Paper Type:
Durable paper stock, often gloss or semi-gloss, to withstand workshop environments.
Engine Type:
Mid-mounted, longitudinal, naturally aspirated V8
Displacement:
3186 cc (3.2 Liters)
Bore X Stroke:
82 mm x 74.5 mm
Valvetrain:
DOHC, 4 valves per cylinder (32 valves total)
Horsepower SAE Net:
220 hp (164 kW) at 6300 rpm
Torque SAE Net:
203 lb-ft (275 Nm) at 4500 rpm
Fuel Delivery:
Bosch K-Jetronic mechanical fuel injection
Fuel Type:
Unleaded gasoline, 91 octane (or higher)
Ignition System:
Distributorless ignition system (DIS) with electronic control
Crash Test Ratings:
No official crash test ratings available from modern agencies due to the era of production.
ABS:
Anti-lock Braking System (ABS) standard on 1989 models.
Brakes Front:
Ventilated discs, 280 mm (11.0 in)
Brakes Rear:
Ventilated discs, 280 mm (11.0 in)
Seat Belts:
3-point retractable seat belts
Steering Column:
Collapsible steering column
Audio System:
Typically equipped with a premium (for its era) analog radio with cassette player. Wiring is covered in this manual.
ABS Implementation:
The ABS system, while rudimentary by modern standards, was a significant technological addition for enhanced safety.
Original Connectivity:
No modern connectivity features like Bluetooth or USB; focused on core vehicle functions.
Oil Change:
Every 5,000 km (3,000 miles) or 1 year, whichever comes first.
Major Service:
Timing belt replacement every 30,000 km (18,000 miles) or 3 years. Check and adjust valve clearances annually.
Brake Fluid:
Replace every 2 years.
Engine Oil:
API SG/SH or ACEA A3 rated, Viscosity 10W-40 or 20W-50 (depending on climate). Capacity: 9.0 Liters (9.5 US Quarts) with filter.
Transmission Fluid:
SAE 75W-90 GL-4 or GL-5 gear oil. Capacity: 2.5 Liters (2.6 US Quarts).
Coolant:
50/50 mix of ethylene glycol-based antifreeze and distilled water.
Brake Fluid:
DOT 3 or DOT 4.
Timing Belts:
Critical for timely replacement to prevent catastrophic engine damage. Belt degradation is a known concern.
Fuel Injection:
K-Jetronic system can be sensitive to vacuum leaks and fuel pressure variations, requiring precise tuning.
Electrical Gremlins:
Aging wiring harnesses and connectors can lead to intermittent electrical issues, making this wiring diagram essential.
Cooling System:
Potential for radiator leaks and aging hoses.
Ferrari Legacy:
Ferrari's rich history in motorsport and luxury sports car manufacturing.
Predecessor:
Ferrari 308 GTB/GTS
Development:
An evolution of the 308, featuring an enlarged 3.2-liter engine and updated styling and chassis.
Production Years:
1985-1989
Production Numbers:
Approximately 712 GTB and 2,745 GTS models produced in total for all model years. 1989 models represent the final year of production.
Manufacturing Location:
Maranello, Italy
